121351262278723 has 2 divisors, whose sum is σ = 121351262278724. Its totient is φ = 121351262278722.

The previous prime is 121351262278559. The next prime is 121351262278739. The reversal of 121351262278723 is 327872262153121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121351262278723 is a prime.

It is a super-2 number, since 2×121351262278723² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121351262278423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60675631139361 + 60675631139362.

It is an arithmetic number, because the mean of its divisors is an integer number (60675631139362).

Almost surely, 2^{121351262278723} is an apocalyptic number.

121351262278723 is a deficient number, since it is larger than the sum of its proper divisors (1).

121351262278723 is an equidigital number, since it uses as much as digits as its factorization.

121351262278723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3386880, while the sum is 52.

The spelling of 121351262278723 in words is "one hundred twenty-one trillion, three hundred fifty-one billion, two hundred sixty-two million, two hundred seventy-eight thousand, seven hundred twenty-three".